What is a DB2 DDL?
Data Definition Language (or DDL) includes those SQL statements that create and drop locations, databases and database objects such as tables and indexes. Changes the configuration of an existing index (DB2). This command is supported syntactically by the XDB Server to maintain compatibility with DB2.
What is DDL give an example?
DDL is Data Definition Language which is used to define data structures. For example: create table, alter table are instructions in SQL. DML: For example: insert, update, delete are instructions in SQL.
How do you get DDL of a table in DB2?
To open the Generate DDL notebook from a database, from the Control Center, expand the object tree until you find the database that contains the objects for which you want to create DDL. Right-click the database and click Generate DDL in the pop-up menu.
What is db2look command?
Extracts the Data Definition Language (DDL) statements that are required to reproduce the database objects of a production database on a test database. The db2look command generates the DDL statements by object type.
What is DML example?
3. DML(Data Manipulation Language): The SQL commands that deals with the manipulation of data present in the database belong to DML or Data Manipulation Language and this includes most of the SQL statements. Examples of DML: INSERT – is used to insert data into a table.
How do I find the schema name for a table in DB2?
select tabname,tabschema from syscat. tables where tabname like ‘PROJECT%’ should show your tables and the schema name.
How do you describe a table structure in DB2?
Tables are logical structure maintained by Database manager. In a table each vertical block called as column (Tuple) and each horizontal block called as row (Entity). The collection of data stored in the form of columns and rows is known as a table.
Is DELETE DDL or DML?
DELETE is a DML command. DELETE is executed using a row lock, each row in the table is locked for deletion. We can use where clause with DELETE to filter & delete specific records. The DELETE command is used to remove rows from a table based on WHERE condition.
Is a view DDL or DML?
In the previous chapters, base tables were used to describe DDL and DML statements. Views are database objects that are always derived from one or more base tables (or views) using metadata information. …
What are DDL commands and what are they used for?
A DDL is a language used to define data structures and modify data. For example, DDL commands can be used to add, remove, or modify tables within in a database. DDLs used in database applications are considered a subset of SQL, the Structured Query Language. However, a DDL may also define other types of data, such as XML.
How do I create the database (Db2)?
Create Db2 Sample Database Launch the Db2 command window Create the Books database. It will take a while to create the database. Download Books sample database script files. Click the following link to download the Books sample database script. Load Books sample database.
What are the commands in DDL?
CREATE to create a new table or database.
What is DB2 Universal Database?
DB2 Universal Database is a Web-enabled relational database management system that supports data warehousing and transaction processing.